Optical switch
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[0046]The present invention develops the optical architecture of large optical cross-connect structures and applies it to medium and small-scale switches to provide a very compact optical switch. For this purpose, two opposing arrays of deflectors, including a plurality of independently and two-dimensionally tiltable micro-mirrors disposed on a MEMS chip, are used in conjunction with an angle-to-offset (ATO) element to provide a switch core in a miniaturized space. The waveguides or fibers are fed through the MEMS chip themselves for compactness, while a single common fixed mirror is added on each opposite MEMS chip for targeting purpose.
[0047]Prior art deflection means in transmission are accomplished using a dual mirror arrangement for doubly deflecting the beam. For example, an array of 2 mirrors is used to steer the beam in transmission; a first fixed mirror is used to redirect a beam to a second 2D tiltable mirror that provides the beam steering. Such a dual mirror arrangement ...
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